3M 9211 Series Respirator 40-Pack This popular respirator can take 4 months to ship. Explore Filtera's other filtration offerings. Next to Availability, click on "from Filtera". On the next page, click on "Filtera Storefront." Add our storefront page to your Favorites. An innovative new respirator designed for optimum comfort. A comfortable respirator is more likely to be worn when needed. 3Ms patented Cool Flow Exhalation Valve is positioned for cool, easy breathing. 3M Model 9211 is rated as an N95 respirator (N95 is not oil resistant, is 95% efficient to 0.3 micron particle sizes) The 3M Model 9211 Respirator is designed for protection against solids, liquids or non-oil-based particles in hot and humid environments.